KSZ8851 Second Generation Single-Port Ethernet Controller

KSZ8851 Second Generation Single-Port Ethernet Controller

The KSZ8851 is a single-port embedded controller chip with 8/16/32-bit and SPI host interfaces. The device is pin compatible with Microchip's KSZ8841 and KSZ8842 product families.

The KSZ8851 integrates a Fast Ethernet MAC/PHY with an 8/16/32-bit generic host processor interface and SPI interface. The device has 18 KB of internal buffer memory shared between the RXQ and TXQ. The buffer memory on the receive queue is 12 KB, while the buffer memory for the transmit queue is 6 KB.

The KSZ8851 is designed with flexibility in mind. The device is designed using a low-power CMOS process which features programmable IO options of 1.8/2.5/3.3 V.

The KSZ8851 supports cable diagnostics feature LinkMD® and Hewlett Packard (HP) Auto-MDIX. The LinkMD® feature determines the length of the cabling plant and also ascertains if there is an open or short condition in the cable. Hewlett Packard (HP) Auto-MDIX features eliminate the need to differentiate between straight or crossover cables.

The KSZ8851 is designed to be fully compliant with the IEEE 802.3 standards. It is also available in industrial grade version.